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  1. E

    MKVIe Ground Detected Above 3300 RPM

    The diagram in the above post is<pre> +125VDC---------------------------------------------------- | | (33 Kohm) | |____________ (Ground) (contact)...
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    GE frame V Gas Turbine Starting Device Trip

    SANJAY MALLIk CSA has written in the above post <I don't know if you have Rung Display on that Mark IV (it wasn't on every Mark IV), or you will have put all the elements of the L3SMT rung (if that's the correct logic name!) on the Logic Forcing Display and watch to see which one is...
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    MKVIe Ground Detected Above 3300 RPM

    CSA Wow. Excellent. Very well explained. I have entered in Gas turbine controls world in 2014 and I do not have experience like you. You have more experience than my age!. I consider myself as your student as I have learned a lot from you via this forum and want to learn more. >As for the...
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    MKVIe Ground Detected Above 3300 RPM

    CSA I need you assistance in understanding concept about grounding in switches. I am looking at Appendix D (Signal Flow Diagrams) of GEH-6195 for writing this. Contact input (switch) is connected across POS and RET of DTBA. POS is connected to P 125VDC via a jumper and RET is connected to...
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    Adding or Changing Block Functions in MARK-Vie

    Nw_Duk If you want to change the functionality of standard blocks, then I guess it is not possible. The blocks work as they are supposed to work. You can just add new blocks and change the parameters of existing blocks. To add new block you need to use block diagram editor in ToolboxST. You...
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    MKVIe Ground Detected Above 3300 RPM

    J. You will get the detailed reply from CSA. As far as I can tell you must check the SOVs which are actuated just before the grounding alarm appears. You can check the Events, SOEs and historical alarms. If you find that the alarm comes when SOV operates, then you need to check the loop of...
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    Free Governor Mode of Operation

    CSA Very good explanation. You are good at explaining things. Rokan_123 When we choose the pre-select mode the GT load remains constant. If the frequency changes the TNR changes automatically. The preselect mode will keep the TNR-TNH constant. This is how it will keep the load constant...
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    GE frame V Gas Turbine Starting Device Trip

    Sanjay Probably more information is required to know what was wrong at your site. Can you provide the list of process and diagnostic alarms before or after the trip? What are the maximum RPM at your site? Do you have separate speed pickups for turbine and starting diesel engine as you said...
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    Synchronization in MarkV and MarkVIe

    CSA You have explained it all. You are so good at explaining things. On our site we have three options for synchronization 1. Auto synchronization from HMI (Uses all three relays) 2. Manual Synchronization from HMI (Uses all three relays. There is bypass logic for some relays in CSP)...
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    Gas Turbine Trip Due to Damper Open Signal Loose

    >MFT trip due to broken support of the HRSG location is the >just before the entrance of exhaust in HRSG. Then ST trip >within a 10 second after that GT trip on that time. Although >GT exhaust site damper is ok mechanical movement is ok. I >want to know proper explanation why it is TRIP. If...
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    MarkVIe: When put in ISO generator purging is shown

    CSA >No; I don't think Isoch mode selects the current frequency; >it selects whatever the value of TNRI is (and that can be >changed by using the RAISE- or LOWER SPEED/LOAD buttons when >Isoch Speed Control Mode is active). Can we change speed in ISO control mode? We never change that...
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    MarkVIe: When put in ISO generator purging is shown

    CSA We found the enumerated variable status_fld in ToolboxST (in software tab under variables. We used the search feature). When we clicked on the variable we found the enumerations information on the left side. DPYSTAST has 28 inputs. We are using only 24. Input 24 was for ISO status. Input...
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    Synchronization in MarkV and MarkVIe

    CSA I know that you must be very busy. We are very lucky to have a person like you. It is better to read your one post here rather then reading number of manuals. Its so kind of you that you somehow manage to take some time out from your busy schedule and answer the questions. I thank you SIR...
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    MarkVIe: When put in ISO generator purging is shown

    CSA Our generator is not hydrogen-cooled. We have checked the DPYSTAT1 block. The message "Generator Purging" is not even configured. We are amazed from where the Cimplicity is getting that message. That message even does not exist on EGD. We have checked the various status field messages by...
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    MarkVIe: When put in ISO generator purging is shown

    The turbine was synched first time after the upgradtion of MarkV to MarkVIe control system. The turbine was running on Droop mode. It was decided to check the ISO mode and turbine was put on ISO mode. Number of things happened when the ISO command was given. 1. Turbine did not go into the ISO...
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    Synchronization in MarkV and MarkVIe

    I want to discuss the how synchronization in done MarkV and MarkVIe. I am not expert in this as I am going to read this first time in DETAIL. Please be patient if I am wrong anywhere. MarkV In MarkV three relays are used for Auto/Manual synchronization. These relays reside on TCTG card...
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    Mark VIe: Excessive Volt/Hertz Trip

    CSA We were afraid that MarkVIe is sending continuous command to the EX2100e after the breaker closure. We looked into that but it was not the case. Sometimes this happens when buttons on the new HMI are not configured properly. Buttons for EX2100e raise lower command were okay but before...
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    Mark VIe: Excessive Volt/Hertz Trip

    We are in the process of installing MarkVIe to our one turbine. The Exciter control system is also being upgraded to EX2100e. We have installed the new panels and are able to run the turbine till FSNL. As soon as the synch is initiated the lockout relay actuates and turbine trips (L86TGT causes...
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    Mark V to MarkVIe Migration

    Hi We are in the process of upgrading our MarkV system to MarkVIe. We are upgrading to the new system due to the same reason. We are replacing the complete MarkV with MarkVIe. CSA can guide better but I will not suggest the MarkV extension. I will suggest you to go for new Mark VIe system...
  20. E

    MarkVIe Deadbus Breaker Closure Simulation

    CSA You need not to say sorry. You were the one who told me that we are going to face this. At least I was ready, although everyone else was reluctant to accept this. Now after seeing the application code everyone is noticing the changes. We have not yet simulated the deadbus. I will give...
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